<template>
  <div class="img">
    <a-upload
      name="file"
      listType="picture-card"
      :multiple="isMultiple"
      :action="uploadAction"
      :headers="headers"
      :data="{biz:bizPath}"
      :fileList="fileList"
      :beforeUpload="beforeUpload"
      :disabled="disabled"
      :isMultiple="isMultiple"

      @change="handleChange"
      @preview="handlePreview"
      :class="[!isMultiple?'imgupload':'', (!isMultiple && picUrl)?'image-upload-single-over':'' ]">
      <div>
        <div class="iconp">
          <a-icon :type="uploadLoading ? 'loading' : 'plus'" />
          <div class="ant-upload-text">{{ text }}</div>
        </div>
      </div>
      <a-modal :visible="previewVisible" :footer="null" @cancel="handleCancel()">
        <img alt="example" style="width: 100%" :src="previewImage"/>
      </a-modal>
    </a-upload>
  </div>
</template>

<script>
  import { ACCESS_TOKEN } from '@/store/mutation-types'
  import storage from 'store'

  const uidGenerator = () => {
    return '-' + parseInt(Math.random() * 10000 + 1, 10)
  }
  const getFileName = (path) => {
    if (path.lastIndexOf('\\') >= 0) {
      const reg = new RegExp('\\\\', 'g')
      path = path.replace(reg, '/')
    }
    return path.substring(path.lastIndexOf('/') + 1)
  }
  export default {
    name: 'JImageUpload',
    data () {
      return {
        uploadAction: '/sys/common/upload',
        uploadLoading: false,
        picUrl: false,
        headers: {},
        fileList: [],
        previewImage: '',
        previewVisible: false
      }
    },
    props: {
      text: {
        type: String,
        required: false,
        default: '上传'
      },
      bizPath: {
        type: String,
        required: false,
        default: 'temp'
      },
      value: {
        type: [String, Array],
        required: false,
        default: ''
      },
      disabled: {
        type: Boolean,
        required: false,
        default: false
      },
      isMultiple: {
        type: Boolean,
        required: false,
        default: false
      },
      number: {
        type: Number,
        required: false,
        default: 0
      }
    },
    watch: {
      value: {
        handler (val, oldValue) {
          if (val instanceof Array) {
            this.initFileList(val.join(','))
          } else {
            this.initFileList(val)
          }
          if (!val || val.length === 0) {
            this.picUrl = false
          }
        },
        immediate: true
      }
    },
    created () {
      const token = storage.get(ACCESS_TOKEN)
      this.headers = { 'X-Access-Token': token }
    },
    methods: {
      initFileList (paths) {
        if (!paths || paths.length === 0) {
          this.fileList = []
          return
        }
        this.picUrl = true
        const fileList = []
        const arr = paths.split(',')
        for (var a = 0; a < arr.length; a++) {
          const url = arr[a]
          fileList.push({
            uid: uidGenerator(),
            name: getFileName(arr[a]),
            status: 'done',
            url: url,
            response: {
              status: 'history',
              message: arr[a]
            }
          })
        }
        this.fileList = fileList
      },
      beforeUpload: function (file) {
        var fileType = file.type
        if (fileType.indexOf('image') < 0) {
          this.$message.warning('请上传图片')
          return false
        }
      },
      handleChange (info) {
        this.picUrl = false
        let fileList = info.fileList
        if (this.number > 0 && this.isMultiple) {
          fileList = fileList.slice(-this.number)
        }
        if (info.file.status === 'done') {
          if (info.file.response.success) {
            this.picUrl = true
            fileList = fileList.map((file) => {
              if (file.response) {
                file.url = file.response.message
              }
              return file
            })
          }
        } else if (info.file.status === 'error') {
          this.$message.error(`${info.file.name} 上传失败.`)
        } else if (info.file.status === 'removed') {
          this.handleDelete(info.file)
        }
        this.fileList = fileList
        if (info.file.status === 'done' || info.file.status === 'removed') {
          this.handlePathChange()
        }
      },
      // 预览
      handlePreview (file) {
        this.previewImage = file.url || file.thumbUrl
        this.previewVisible = true
      },
      getAvatarView () {
        if (this.fileList.length > 0) {
          const url = this.fileList[0].url
          return url
        }
      },
      handlePathChange () {
        const uploadFiles = this.fileList
        let path = ''
        if (!uploadFiles || uploadFiles.length === 0) {
          path = ''
        }
        const arr = []
        if (!this.isMultiple && uploadFiles.length > 0) {
          arr.push(uploadFiles[uploadFiles.length - 1].response.message)
        } else {
          for (let a = 0; a < uploadFiles.length; a++) {
            if (uploadFiles[a].status === 'done') {
              arr.push(uploadFiles[a].response.message)
            } else {
              return
            }
          }
        }
        if (arr.length > 0) {
          path = arr.join(',')
        }
        this.$emit('change', path)
      },
      handleDelete (file) {
        // 如有需要新增 删除逻辑
        console.log(file)
      },
      handleCancel () {
        this.close()
        this.previewVisible = false
      },
      close () {

      }
    },
    model: {
      prop: 'value',
      event: 'change'
    }
  }
</script>

<style scoped>
  /deep/ .imgupload .iconp{padding:20px;}
  /deep/ .image-upload-single-over .ant-upload-select{display: none}
</style>
